Under NetBSD you're looking for a vnode disk (see man vnconfig).
	NetBSD uses 'loopback filesystem' to refer to an existing
	filesystem that is remounted on the same host.
	
		David/absolute

         -=- They took away my irony, but they left my deceit  -=-

On Sat, 27 Mar 1999, Joseph Sarkes wrote:

> I have in the past used a loopback filesystem feature
> of linux to verify a cdrom image prior to burning it
> onto a blank. Also, it is useable for making floppy
> disk images. 
> 
> Is there a method of mounting a file in loopback mode
> as a filesystem in NetBSD? I don't see it in the man
> pages, or mentioned in any options. Just entire file
> system partitions are mentioned.
> 
> If I am just missing something, where is it documented.
> Assuming that it is not existant, is there a particular
> reason that it is not included in NetBSD?
> 
> -- 
> Joseph Sarkes                   mailto:joe@mediaone.net
>